Robot Finds Worlds Sixth Largest River Undersea

Scientists at University of Leeds are
using a robotic submarine to study a deep channel that runs along
the floor of the Black Sea.
The underwater river is denser than the surrounding water and composed
of sediment with a high salinity. There are similarities to land-based
rivers but also major differences in how the mass flows.
Study of the flow is being performed by a 7-metre torpedo-shaped robot
called the
Autosub3 because its accurate positioning system allows it to be
programmed to stay just above the channel to prevent damage.